on (one's) (own) terms
In the manner or timeframe that one prefers. He went out on his own terms, retiring at the top of his game after only 10 seasons. Don't just accept this job because it would make your parents happy—you need to act on your own terms for once.
on terms
1. Equal in score; having the same number of points. Despite the home team vastly outperforming their rival, the two remained on terms at the halftime break.
2. Partnered or having an affinity with someone. The stranger was suspected by the superstitious townsfolk of being on terms with the devil.